    <SEC-DOCUMENT>0001140361-21-014371-index.html : 20210427
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    <ACCEPTANCE-DATETIME>20210426211152
    ACCESSION NUMBER:		0001140361-21-014371
    CONFORMED SUBMISSION TYPE:	F-4/A
    PUBLIC DOCUMENT COUNT:		20
    FILED AS OF DATE:		20210427
    DATE AS OF CHANGE:		20210426

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ICON PLC
    		CENTRAL INDEX KEY:			0001060955
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
    		IRS NUMBER:				981067160

    	FILING VALUES:
    		FORM TYPE:		F-4/A
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-254891
    		FILM NUMBER:		21855639

    	BUSINESS ADDRESS:
    		STREET 1:		SOUTH COUNTY BUSINESS PARK
    		STREET 2:		LEOPARDSTOWN
    		CITY:			DUBLIN 18
    		STATE:			L2
    		ZIP:			00000
    		BUSINESS PHONE:		00 353 1 291 2000

    	MAIL ADDRESS:
    		STREET 1:		SOUTH COUNTY BUSINESS PARK
    		STREET 2:		LEOPARDSTOWN
    		CITY:			DUBLIN 18
    		STATE:			L2
    		ZIP:			00000

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ICON PLC  /ADR/
    		DATE OF NAME CHANGE:	20010213
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>F-4/A
    <SEQUENCE>1
    <FILENAME>nt10020839x2_f4a.htm
    <DESCRIPTION>F-4/A
    <TEXT>
    Document 1 - file: nt10020839x2_f4a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-5.1
    <SEQUENCE>2
    <FILENAME>nt10020839x2_ex5-1.htm
    <DESCRIPTION>EXHIBIT 5.1
    <TEXT>
    Document 2 - file: nt10020839x2_ex5-1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-21.1
    <SEQUENCE>3
    <FILENAME>nt10020839x2_ex21-1.htm
    <DESCRIPTION>EXHIBIT 21.1
    <TEXT>
    Document 3 - file: nt10020839x2_ex21-1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.1
    <SEQUENCE>4
    <FILENAME>nt10020839x2_ex23-1.htm
    <DESCRIPTION>EXHIBIT 23.1
    <TEXT>
    Document 4 - file: nt10020839x2_ex23-1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.2
    <SEQUENCE>5
    <FILENAME>nt10020839x2_ex23-2.htm
    <DESCRIPTION>EXHIBIT 23.2
    <TEXT>
    Document 5 - file: nt10020839x2_ex23-2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>6
    <FILENAME>nt10020839x2_ex99-1.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 6 - file: nt10020839x2_ex99-1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>7
    <FILENAME>nt10020839x2_ex99-2.htm
    <DESCRIPTION>EXHIBIT 99.2
    <TEXT>
    Document 7 - file: nt10020839x2_ex99-2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.3
    <SEQUENCE>8
    <FILENAME>nt10020839x2_ex99-3.htm
    <DESCRIPTION>EXHIBIT 99.3
    <TEXT>
    Document 8 - file: nt10020839x2_ex99-3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.4
    <SEQUENCE>9
    <FILENAME>nt10020839x2_ex99-4.htm
    <DESCRIPTION>EXHIBIT 99.4
    <TEXT>
    Document 9 - file: nt10020839x2_ex99-4.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.5
    <SEQUENCE>10
    <FILENAME>nt10020839x2_ex99-5.htm
    <DESCRIPTION>EXHIBIT 99.5
    <TEXT>
    Document 10 - file: nt10020839x2_ex99-5.htm

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>image00001.jpg
    <TEXT>
    Document 11 - file: image00001.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>logo_icon.jpg
    <TEXT>
    Document 12 - file: logo_icon.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>logo_iconx1.jpg
    <TEXT>
    Document 13 - file: logo_iconx1.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>logo_prahealthsci.jpg
    <TEXT>
    Document 14 - file: logo_prahealthsci.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>logo_prahealthscix1.jpg
    <TEXT>
    Document 15 - file: logo_prahealthscix1.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>logo_ubs.jpg
    <TEXT>
    Document 16 - file: logo_ubs.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>nt10020839x2_ex99-1img01.jpg
    <TEXT>
    Document 17 - file: nt10020839x2_ex99-1img01.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>nt10020839x2_ex99-1img02.jpg
    <TEXT>
    Document 18 - file: nt10020839x2_ex99-1img02.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>nt10020839x2_nc01.jpg
    <TEXT>
    Document 19 - file: nt10020839x2_nc01.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>nt10020839x2_nc02.jpg
    <TEXT>
    Document 20 - file: nt10020839x2_nc02.jpg

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